Whatever the new range is, it's way too short. You can easily sneak up behind people and Spartan Charge them without them noticing, or otherwise ambush them. By time they show up on your radar (if they show up at all) it's already too late. At this point you might as well not have a radar, it's that useless. 25 meters was as short-range as it needed to be. It had been the default range since Halo 2. There was no reason to change it. If the change was made at the behest of pro players, well, screw the pro players. Matchmaking is not MLG, and it doesn't need to be. Bumping the radar back to 25 m would make MP so much more bearable.